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1 article(s) from Greiner, Julian

Derivatives of the triaminoguanidinium ion, 5. Acylation of triaminoguanidines leading to symmetrical tris(acylamino)guanidines and mesoionic 1,2,4-triazolium-3-aminides

Jan Szabo,
Julian Greiner and
Gerhard Maas

Beilstein J. Org. Chem. 2017, 13, 579–588, doi:10.3762/bjoc.13.57

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Scheme 1: Reactions of aminoguanidines with carboxylic acids and acid chlorides. The structural formulae show...

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Scheme 2: Threefold N-acylation of triaminoguanidinium chloride (1) with acyl chloride 2b.

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Scheme 3: Reaction of 1,2,3-tris(benzylamino)guanidinium salts 4 and 5 with acyl chlorides to give 1,2,3-tris...

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Figure 1: Molecular structure of 6b·2C₂H₅OH in the solid state, with numbering of atoms (ORTEP plot). Selecte...

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Scheme 4: Protonation and methylation of 1,2,4-triazolium-3-aminides 7b,c.

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Scheme 5: Catalytic hydrogenation/debenzylation of betaines 7.

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Figure 2: Left: molecular structure of 8b in the solid state (OLEX2 plot). Right: crystal structure viewed al...

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Figure 3: Left: solid-state structure of 9b·H₂O (ORTEP plot). Right: centrosymmetric hydrogen-bonded dimer of...

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Figure 4: Solid-state structure of mesoionic compound 7a (ORTEP plot); thermal displacement ellipsoids are dr...

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Figure 5: UV–vis spectra of 7a–d in chloroform (c = 0.04 mmol L⁻¹); λ_max [nm] (ε [L mol⁻¹ cm⁻¹]): 7a: 350 (47...

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Published 22 Mar 2017

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